Product details
Weiss Industrial Thermowell | ENS9-75BS | 7.5″ Length | Brass
Product Description
The ENS9-75BS is a precision-machined protective housing that allows thermometers to be installed, maintained, or replaced without shutting down the system or draining the fluid lines. The “ENS” designation identifies this as a Brass Stepped Stem thermowell. The stepped design (a reduced diameter at the sensing tip) is specifically engineered to minimize thermal mass, ensuring a faster temperature response compared to straight-shank models.
The “9” in the model number typically denotes a 3/4″ NPT process connection, which is the most widely used size in UAE mechanical piping. The “75” indicates an overall length of 7.5 inches (190 mm). This length is specifically designed to house 6-inch (150 mm) stem thermometers, providing a 1.5-inch clearance that acts as a lagging extension to clear standard thermal insulation in Dubai and Abu Dhabi plant rooms.
Key Features
- High Thermal Conductivity: The brass construction allows for immediate heat transfer from the fluid to the thermometer sensor, providing accurate, real-time data.
- Stepped Stem Design: Reduces thermal lag by decreasing the metal volume around the thermometer bulb at the critical sensing point.
- 5″ Total Length: Perfect for 6-inch stem thermometers, ensuring the sensing tip is deeply immersed in the fluid flow while the dial clears the insulation.
- Standard 3/4″ NPT Connection: Ensuring seamless installation into standard pipe tees and fittings used in mechanical infrastructure.
- Structural Protection: Protects the sensitive thermometer stem from bending or snapping due to the force of high-velocity fluid flow.
Technical Specifications
| Specification | Details |
| Brand | Weiss Instruments |
| Model | ENS9-75BS |
| Overall Length | 7.5″ (190 mm) |
| Insertion Length (U) | 6″ (150 mm) |
| Material | Brass |
| Stem Design | Stepped Shank |
| Process Connection | 3/4″ NPT |
| Internal Thread | 1-1/4″ – 18 UNEF (Industrial Standard) |
| Application | HVAC / Chilled Water / Hot Water |
Frequently Asked Questions
- Q: Why use a 7.5″ well for a 6″ thermometer?
- A: The extra length accounts for the thickness of the pipe fitting and the insulation. This ensures that the 6-inch thermometer stem is fully immersed within the well inside the active fluid stream.
- Q: Which thermometer fits this well?
- A: This well is designed for any standard industrial thermometer with a 6-inch stem, such as the Weiss A9VU6 or 9VBM6 series.
- Q: Can this be used for domestic (potable) water?
- A: For drinking water systems in the UAE, you should verify if the project requires a Lead-Free (LF) version (model ENS9-75BSLF) to comply with local health regulations.